Alarm system.



c. AQKALLNBACH.

ALARM svs'tam. APPLICATION FILED MAY 8. I913.

rammed Jan. 16

3 SHEETS-SHEET Zl/ztnesss In v6 72 bar car/=72 fl d/zzdaci G. A. KALLNBACH. ALARM SYSTEM. APPLICATION FILED MAY 5. 1913.

Patented Jan. 16, 1917.

a suns-sum 3.

I'll by:

7 JNVENTOI? WITNESSES:

UNITED srnrnsrxrnnr oFFm V CARL A. KALLNIBACH, ornnrnoir, MIc'HIeAn, Assrenon TO THE KALLN aAcH Auro- MA'LIC rmn ALARM comrruw; or CLEVELAND, omo, A conronarronfor onro.

- ALARM svsrnm. 1

Specification of Letters Patent. Patented Ja 16, 1917 Application filed May '8, le s. Serial No. 766,251. g

To all whom it may concern Be itknown that I, CARL A. KALLn eoiI, a citizen of the United States, residingat Detroit, in the county of Wayne and State of Michigan, have invented a new and,use-= ful Improvement -in Alarm Systems, of

i which the following is'a specification, the

principle of the inventionbeing herein explained and the best mode in which I have contemplated applying that principle, so as to distinguish it-from other inventions.

My invention has general reference to an alarm system and more particularly to a duplex automatic electric fire alarm.

The object is the provision of a mode for effecting the desired results more eflicaciously and yet involve structural details which will be simple and economical of manufacture.

My inventivev conception involves two types of alarm intended for cooperative use.

A number of outlying automatic alarm sounding devices are intended for distribution about the premises which it is proposed to safeguard against fire. In addition one or more alarm indicating-devices are dis-,

posed at a central point or a corresponding numberof places to which direct and ready access may be had. "These are preferably accompanied 'as a unitstructure with one of the sounding types. 'Coincidently with the starting ofa fire near any one of the. alarm sounders, such that the particular one is operated, the more or. less distant indicator designates the location in which the fire has origmated.

The inventive conception is'embodied in means which are hereinafter explained and variously defined in the claims, while the annexed drawing-and particular description thereof together set forth in detail'one certain means constituting my invention, the

disclosed means however, being but one of various mechanical forms in which the princi 1e of my invention may be applied.

eferring next to the drawing in which like figures of reference designate like parts throughout the several views: Figure I is an elevation of one part of my invention, the front of the casing being removed. Fig. II shows a side view of the same.

Fig. III,

represents a complementary part associated with the part first seen, on a reduced scale and with the casing intact. Fig. IV is a diagrammatic view of but'one system in its casing l having a rear pair of forwardly projecting symmetrical entirety of the eight according to this exem- 'plification.

Sounding device-This is thepart which i has been first mentioned and as best seen in Fig, I is the device which is adapted to automatically sound an alarm when sufi'ciently close to the source of heat. The operation or closing of the actuating circuit is brought manner to a wall or other fixture, a curved shield 2 secured thereto below, and a forward compartment 3. This latter is open below and has a removable cover 4. An electric bell including a magnet 5, gong 6 and hammer 7 is operatively mounted near the top of the supporting portion 2 and is electrically connectedthrough the medium of lead wires 8 and 9. Below the'bell are a brackets 10 provided at their ends with fixing screws 11. l i

Tkerm0stat's.Some distance below and in line with each of the brackets 10 are two other brackets 12having upturned forward.

extremities 13 directly below the respective ends of the brackets 10. The extremities 13 are fashioned with platinum coated cones 14. These cones are electrically connected by terminal wires each numbered 15. Any

approved type ,of mercury thermometer I6 -1s suspended from the frame 1 as is best seen in Fig. II. The lower end is fashioned withiabulb 17 disposed behind theshield I 2 and between the brackets 12. The thermometer tube is graduated according to the Fahrenheit scale as suggested. Another terminal wire 18 connects electrically with the mercury and is attached in the bulb 17 by means of a simple set screw 19'. A weighted member 20 extends across the front of the thermometer near its top. De-

pending from opposite ends of the member 7 20 are a pairof tubes '21insulated above at'22." These tubes are platinum lined i teriorly and are in gravitational alinement respectively with the cones 14. upon which they may be snugly seated by reason of their restricted dimensions. The upper ends of nected each with the alloy 24 and one ofthe fixing screws 11 uponthe brackets. 10. It

should also be manifest, assuming] a battery in circuit, by what setof' elements two thermostatic combinations are established.

To explain: Assuming the single circuit which could be established from so much of my system as has been thus far described and assuming further the presence somewhere in such circuit of a battery, it'will be seen that the thermostat in one case is the column of mercury its'elf. This column rising by reason of its proximlty to the heat,

comes eventually, and preferably at a point.

somewhat 'over 150 degrees Fahrenheit, in contact with the wire 23 23". Inasmuch as the mercury column constitutes in efiect one terminal, since directly connected with the terminal wire 18, the joining of the two terminals necessarily serves to close the circuit. To. followthe circuit as controlled by this particular thermostat, around from the battery through the sounding device and back to the battery, reference may be had to the diagrammatic view seen in Fig.

IV. It will there be seen that this particu lar circuit has been designated, as apart of the first acting thermostat, by the letters W, W and 'W Leaving the battery B at the left, the current passes upwardly through the wire 8 into the magnet coil,

then out along the wire 9 and downwardly across the wire portion 23 and then again downwardly through the mercury column and the wire 18 and finally backto the other end of the battery. 'Assuming again substantially this same single circuit with its battery, it will be seen that the thermostatic control in the other case is the fusible alloy 24 which on melting, permits the fall of the tubes 21 until they rest upon the cones 14 thereby again automatically closing the circuit. The circuit in this case merely includes-in part substitution for and in part addition to the W portion of the circuit which is really the wirec portion 23; the

'W portions or terminal wires 15 each of which connects with the wire leading back to the return end of the battery. Inasmuch as the fusible alloy 24 melts only at the higher temperature stated, it is obvious that the thermostat of which it forms a part independently closes the circuit, subsequent to the time it is intended that the upward movement of the mercury column as a part of the first acting thermostat shall effect this result.

Indicating dem'ce.In the form seen in Fig. III this complementary part of my system combines, besides its own diflerent features, all of those just considered in connection with the description of the enlar ed details of Figs. 1 and II. It willbe un erstood however that the two devices need not be associated in a single structure Proceeding then to the description of the distinct features only, it will be seen that in the nature of an lndex chart is provided. The compartment 3 is altered by the addition of lateral spaces 26 and 27 and a top space 28 while the cover 4 is correspondingly broadened to include lateral extensions 29 and 30. These are provided with openings, as it happens for the exemplifying purpose in hand, with four openings each. Ilhese openings may be covered with glass slides upon which appear indicia of the eight localities on the premises at each of which it Was decided to place one of my sounding devices. As represented, those to indicate, barn, rear of building, 2 d

stairway and 1st stairway; whereas those'on the right again reading down in order indicate, attic, 2nd floor, 1st floor and basement. Fitted over the ex tra top space 28v is another glass upon which appears the word Fire. Under each of the nine glass slides just mentioned and which may be assumed to be removable, is an electric lamp. The lamp 31 under the word Fire is electrically connected in parallel via a connection which I have designated by the letters Y Y with every one of the eight W, W, W and necessarily with every one of the eight W, W W, W circuits. On the other hand, each of the other eight lamps 32 is in series with the lamp 31 while similarly connected in parallel with only one particular circuit W, W, W W that is with onlyone articular one of the eight outlying soun ing devices such as is shown in Fig. IV. For the purpose of illustrating in what manner this -'double alarm system may be operated by either of two successively operating thermostats, it has-been taken for granted that a fire has gained headway in the rear of building, likely the kitchen. Reference to the diagrammatic view seen in Fig. IV

clearly shows how the operation of either thermostat would include the' connection Y Y in parallel and simultaneously light thelamps under Fire and R.

perati0n.But little concerning the operation of the system as a whole need be said in view of the explanation as to the interrelation of the two devices 'which has possibility of connecting my alarm systemgone before. However, to consider two instances very briefly: fire starting in the kitchen which falls under the heading R presently causes the temperature to rise and in due course the mercury in the thermometer of the particular sounding device located for the purpose in or sufficiently near such room. Directly the mercury column comes into contact with the wire 23 the bell should 'besounded in the. kitchen and at the same moment the two lamps inthe indicating device under Fire and .R? are lighted; If any person on the premises does not happen to be in the kitchen but hears the bell which is ringing not knowing precisely where it is, he can step to the central point where the indicating device is properly located and at once ascertain the approximate location where the fire originated. It is merely in the event that the fire should happen to find its origin nearer the location of the indicating device than any of the outlying sounding devices andto avoid therefore an additional soundingdevice adjoining the inwith the same battery or set of batteries whichsupply the current for the ordinary electric bell system generally in vogue and involving push buttons. When these two differently 'purposed systems are. thus connected with the same source of current, a testln facility isafi'orded for ascertaining w ether my alarm system is capable of bination of a plurality operating when. needed. In short, under the circumstances considered, every time one pressed a 4 push button of a door bell and found it working, he could 'ipso. facto rely upon a satisfactory working of my system. My invention being thus described with sufiicient thoroughness, what I desire to secure by Letters, Patent and therefore claim specific'ally'is: I

1. An alarm system comprismg the 'combination of. a plurality of electric circuits each provided with a-pa1r of successively operating thermostats and an annunciator, said circuits furthermorehaving connected in parallel therewith respectively, each its individual signal and all additionally one common signal.

2. An alarm system'comprising the common signal connected'm series with eachof said circuits a particular signal connected in ser es with each suchclrcu' t, a local s1g-- of circuits, a comnal connected in parallel with eachsuch circuit, and a corresponding number of pairs of thermostats for successively controlling said circuits respectively, and each adapted invariably to eflect three distinct signals simultaneously.

3. 'An alarm system comprising in combination,"a plurality .of outlying electric circuits each including a pair of local thermostats and a local annunciator, and a corre sponding number of lines connected in parallel therewith respectively, each of said parallelsincluding a common signal and a distinct designating signal, said common signal and all of said designating signals v being placed together,

Signed by me, this 25th day of April, 1913.

Attested by- LYNN E. MUELLER, HELEN 'HINE.

CARL A. KALLNBACH. 

